/* pi 中文站 — 设计系统
 * 深色海军蓝 + 细网格纹理 + 衬线斜体大标题 + 等宽字体点缀
 * 支持自动 / 亮色 / 暗色三种主题
 */

:root {
  --bg: #151b2b;
  --bg-deep: #101523;
  --bg-elev: #1a2133;
  --bg-panel: #121728;
  --border: #262e45;
  --border-soft: #202840;
  --text: #e8e6de;
  --text-strong: #f4f2ea;
  --muted: #9aa2b6;
  --faint: #6b7386;
  --accent: #8fb0dd;
  --accent-dim: #6e93c4;
  --orange: #e09a5d;
  --green: #63d68d;
  --red: #e07a7a;
  --code-bg: #1b2236;
  --chip-bg: #222a42;
  --grid-line: rgba(255, 255, 255, 0.028);
  --nav-bg: rgba(24, 30, 46, 0.92);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --serif: "Source Han Serif SC", "Songti SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

[data-theme="light"] {
  --bg: #f4f2ea;
  --bg-deep: #ece9df;
  --bg-elev: #faf8f2;
  --bg-panel: #fbfaf5;
  --border: #d8d3c4;
  --border-soft: #e2ddd0;
  --text: #23283a;
  --text-strong: #161a28;
  --muted: #5d6478;
  --faint: #8b91a3;
  --accent: #3d6aa8;
  --accent-dim: #557cad;
  --orange: #b96a2c;
  --green: #2e8f57;
  --red: #b85252;
  --code-bg: #eae7db;
  --chip-bg: #e6e2d4;
  --grid-line: rgba(0, 0, 0, 0.045);
  --nav-bg: rgba(248, 246, 238, 0.92);
  --shadow: 0 12px 32px rgba(60, 60, 40, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--bg);
  background-size: 28px 28px, 28px 28px, auto;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: rgba(143, 176, 221, 0.28); }

/* ---------- 顶部导航 ---------- */

.topnav {
  position: sticky;
  top: 12px;
  z-index: 50;
  margin: 12px auto 0;
  max-width: min(1360px, calc(100% - 48px));
  background: var(--nav-bg);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  backdrop-filter: blur(10px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
}

.topnav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
}

.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo svg { display: block; }
.nav-logo:hover { text-decoration: none; }

.nav-links {
  display: flex;
  gap: 28px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.topnav-inner { position: relative; }

.nav-links a {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding: 4px 2px;
}

.nav-links a:hover { color: var(--text-strong); text-decoration: none; }

.nav-links a.active {
  color: var(--text-strong);
  border-bottom: 1px solid var(--text-strong);
  padding-bottom: 2px;
}

.nav-right { display: flex; align-items: center; gap: 14px; }

.theme-toggle {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--text-strong); border-color: var(--muted); }

/* ---------- 版式 ---------- */

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.section { padding: 88px 0; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--text-strong); }

.display {
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.28;
  font-style: italic;
  font-weight: 500;
  text-align: center;
  margin: 0 0 18px;
}

.h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  font-style: italic;
  font-weight: 500;
  line-height: 1.3;
  margin: 0 0 20px;
}

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 14px;
}

.lead { font-size: 17.5px; color: var(--muted); max-width: 62ch; }
p { margin: 0 0 16px; }

.muted { color: var(--muted); }

code.chip {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--chip-bg);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  padding: 1px 7px;
  white-space: nowrap;
  color: var(--text);
}

kbd {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 7px;
  white-space: nowrap;
}

/* ---------- Hero ---------- */

.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px 80px;
  position: relative;
}

.hero .display .hl { color: var(--accent); }

.hero-install { margin-top: 44px; width: 100%; max-width: 640px; }

.hero-tag {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--faint);
}

.hero-logo { margin-bottom: 30px; }

.hero-links {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: 8px;
  padding: 9px 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.btn:hover { border-color: var(--accent-dim); text-decoration: none; transform: translateY(-1px); }

.btn.primary {
  background: var(--text-strong);
  color: var(--bg);
  border-color: var(--text-strong);
}
.btn.primary:hover { opacity: 0.9; }

.scroll-hint {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--faint);
  animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 7px); } }

/* ---------- 安装命令切换 ---------- */

.install-box {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-panel);
  overflow: hidden;
  text-align: left;
  box-shadow: var(--shadow);
}

.install-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-soft);
  overflow-x: auto;
}

.install-tabs button {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 16px;
  cursor: pointer;
  white-space: nowrap;
}
.install-tabs button.active { color: var(--text-strong); border-bottom-color: var(--accent); }

.install-body {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
}

.install-body code {
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text);
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}
.install-body .p { color: var(--accent); }

.copy-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  flex-shrink: 0;
}
.copy-btn:hover { color: var(--text-strong); }

/* ---------- 特性区（终端 + 文本 双栏） ---------- */

.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.feature + .feature { margin-top: 110px; }
.feature.flip .demo { order: 2; }
.feature.flip .copy { order: 1; }

.feature .copy h2 { margin-top: 0; }
.feature .copy .kicker { margin-bottom: 10px; }

/* ---------- 终端窗口 ---------- */

.term {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-elev);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

.term-bar .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px rgba(99, 214, 141, 0.7);
  flex-shrink: 0;
}

.term-bar .cap { margin-left: 4px; }

.term-body { padding: 16px 18px; min-height: 210px; }
.term-body pre { margin: 0; font-family: inherit; white-space: pre-wrap; word-break: break-word; }

.term-foot {
  padding: 9px 14px;
  border-top: 1px solid var(--border-soft);
  color: var(--faint);
  font-size: 11.5px;
}

.t-dim { color: var(--faint); }
.t-accent { color: var(--accent); }
.t-orange { color: var(--orange); }
.t-green { color: var(--green); }
.t-red { color: var(--red); }
.t-bold { color: var(--text-strong); font-weight: 600; }

.caret {
  display: inline-block;
  width: 8px; height: 16px;
  background: var(--text-strong);
  vertical-align: text-bottom;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 打字动画 */
.type-line { display: block; min-height: 1.65em; }

/* ---------- 卡片网格 ---------- */

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.grid2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-panel);
  padding: 22px 22px 18px;
}

.card h3 {
  font-family: var(--mono);
  font-size: 13.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 10px;
  color: var(--text-strong);
  font-style: normal;
}

.card p { font-size: 14.5px; color: var(--muted); margin-bottom: 8px; }
.card .strike { text-decoration: line-through; text-decoration-color: var(--red); }

/* ---------- 提供商 ---------- */

.provider-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.provider-cloud span {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: 999px;
  padding: 5px 14px;
}

/* ---------- 模式区 ---------- */

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 34px;
}

/* ---------- CTA ---------- */

.cta {
  border: 1px solid var(--border);
  border-radius: 14px;
  background:
    linear-gradient(rgba(143, 176, 221, 0.05), rgba(143, 176, 221, 0)),
    var(--bg-panel);
  text-align: center;
  padding: 64px 28px;
}

/* ---------- 页脚 ---------- */

footer {
  border-top: 1px solid var(--border-soft);
  margin-top: 60px;
  padding: 44px 0 60px;
  color: var(--faint);
  font-size: 13.5px;
}

.foot-grid {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.foot-col h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}

.foot-col a { display: block; color: var(--faint); padding: 3px 0; }
.foot-col a:hover { color: var(--text-strong); text-decoration: none; }

.foot-note { margin-top: 34px; font-size: 12.5px; line-height: 1.8; }
.foot-note a { color: var(--muted); }

/* ---------- 文档布局 ---------- */

.docs-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 48px;
  padding-top: 44px;
  padding-bottom: 90px;
  align-items: start;
}

.docs-side {
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  font-size: 14px;
  padding-right: 6px;
}

.docs-side .group {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 22px 0 8px;
}
.docs-side .group:first-child { margin-top: 0; }

.docs-side a {
  display: block;
  color: var(--muted);
  padding: 4px 10px;
  border-left: 1px solid var(--border);
  border-radius: 0 6px 6px 0;
}
.docs-side a:hover { color: var(--text-strong); text-decoration: none; }
.docs-side a.active {
  color: var(--text-strong);
  border-left: 2px solid var(--accent);
  background: rgba(143, 176, 221, 0.06);
}

.docs-main { min-width: 0; }

.docs-main h1 {
  font-size: 34px;
  font-style: italic;
  font-weight: 500;
  margin: 6px 0 22px;
}

.docs-main h2 {
  font-size: 24px;
  font-style: italic;
  font-weight: 500;
  margin: 40px 0 14px;
  padding-top: 18px;
}

.docs-main h3 { font-size: 18.5px; margin: 30px 0 10px; }

.docs-main ul, .docs-main ol { padding-left: 24px; }
.docs-main li { margin: 5px 0; }

.docs-main code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--chip-bg);
  border-radius: 5px;
  padding: 1px 6px;
}

.docs-main pre {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.65;
}

.docs-main pre code { background: none; padding: 0; font-size: inherit; }

.docs-main blockquote {
  margin: 18px 0;
  padding: 10px 18px;
  border-left: 3px solid var(--accent-dim);
  background: rgba(143, 176, 221, 0.05);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
}

.docs-main table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 18px 0;
  display: block;
  overflow-x: auto;
}

.docs-main th, .docs-main td {
  border: 1px solid var(--border-soft);
  padding: 8px 12px;
  text-align: left;
}
.docs-main th { background: var(--bg-elev); font-family: var(--mono); font-size: 12.5px; }

.docs-main hr { border: none; border-top: 1px solid var(--border-soft); margin: 36px 0; }

.docs-main img { max-width: 100%; border-radius: 8px; }

.trans-note {
  font-size: 12.5px;
  color: var(--faint);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin: 0 0 28px;
  line-height: 1.7;
}

.doc-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--border-soft);
}
.doc-pager a {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}
.doc-pager a:hover { color: var(--text-strong); text-decoration: none; }

/* ---------- 列表页（新闻 / 包 / 模型） ---------- */

.page-head { padding: 72px 0 8px; }

.page-head h1 {
  font-size: clamp(30px, 4vw, 44px);
  font-style: italic;
  font-weight: 500;
  margin: 0 0 12px;
}

/* ---------- 自动同步的版本列表 ---------- */

.rel-box {
  margin: 30px 0 4px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-panel);
  overflow: hidden;
}

.rel-box .box-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-soft);
}

.rel-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text);
}
.rel-item:last-child { border-bottom: none; }
.rel-item:hover { background: var(--bg-elev); text-decoration: none; }
.rel-item .rel-tag { font-family: var(--mono); font-size: 13px; color: var(--green); flex-shrink: 0; }
.rel-item .rel-name { flex: 1; font-size: 14px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rel-item time { font-family: var(--mono); font-size: 11.5px; color: var(--faint); letter-spacing: 0.08em; flex-shrink: 0; }

.release {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-panel);
  padding: 26px 28px;
  margin-top: 22px;
}

.release .r-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.release .r-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 8px;
}

.release h2 { font-size: 23px; margin: 0; font-style: italic; font-weight: 500; }
.release time { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.12em; }
.release ul { padding-left: 22px; margin: 14px 0 6px; }
.release li { margin: 4px 0; font-size: 14.5px; color: var(--muted); }
.release li strong { color: var(--text); font-weight: 600; }

.list-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 26px 0 6px;
}

.list-toolbar input, .list-toolbar select {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 13px;
  outline: none;
}
.list-toolbar input { flex: 1; min-width: 220px; }
.list-toolbar input:focus, .list-toolbar select:focus { border-color: var(--accent-dim); }

.pkg-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-panel);
  padding: 18px 20px;
  margin-top: 14px;
}

.pkg-item .p-name { font-family: var(--mono); font-size: 14.5px; color: var(--text-strong); font-weight: 600; }
.pkg-item .p-meta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; font-family: var(--mono); font-size: 11.5px; color: var(--faint); letter-spacing: 0.06em; }
.pkg-item .p-desc { font-size: 14px; color: var(--muted); margin-top: 8px; }
.pkg-item .p-cmd {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--green);
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  padding: 6px 10px;
  display: inline-block;
}

table.models {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin-top: 22px;
  display: block;
  overflow-x: auto;
}

table.models th, table.models td {
  border-bottom: 1px solid var(--border-soft);
  padding: 9px 12px;
  text-align: left;
  white-space: nowrap;
}
table.models th {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted);
  border-bottom: 1px solid var(--border);
}
table.models td.mono { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }

.provider-group h2 {
  font-size: 22px;
  font-style: italic;
  font-weight: 500;
  margin: 44px 0 4px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .nav-links { display: none; }
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 26px; }
  .feature.flip .demo { order: 0; }
  .feature.flip .copy { order: 0; }
  .grid3 { grid-template-columns: 1fr; }
  .grid2, .mode-grid { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; gap: 26px; }
  .docs-side { position: static; max-height: none; }
  .section { padding: 60px 0; }
}